But the RTX 30-series optical flow units weren't as capable, and so Nvidia chose to hardware-lock the feature to the RTX ...

But, what about Nvidia's older 10 and 20 series GPUs? Surely, those are a good value now with price drops and decent performance? Nope. Here's why: Any Nvidia 10 or 20 series GPU you can buy today ...

which first introduced similar features with its GeForce RTX 20 Series in 2018, and with AMD, which supports ray tracing and an upscaling technique that does not rely on AI for its Radeon GPUs.